I have created some more problem....i have install Windows7 in my pc. i was having two OS(PearLinux & LinuxMint). I delete the partition of LinuxMint and choose for Pear Linux....I deleted the Partition of linuxMint and in that i have installed Windows7 and further when i restarted my pc , i saw that there was no option to choose the OS either Window7 or Pear.It directly started with the Windows....Plzz tell me what to do..I want to use both OS..Plzzz.